JB/T 7422.2-1999 This standard is a revision of ZB J55 017-87 "Vertical internal honing machine accuracy". This standard is part of the JB/T 7422 "Vertical honing machine" series of standards: JB/T 7422.1-1999 Vertical internal honing machine parameters JB/T 7422.2-1999 Vertical internal honing machine precision inspection JB/T 7422-1994 Vertical internal honing machine technical conditions The standards supporting this standard are: JB/T 5603-1991 Vertical internal honing machine series JB/T 9896-1999 Honing head parameters This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of vertical internal honing machines. This standard applies to general-purpose vertical internal honing machines with a maximum honing diameter of 25~1000mm. This standard was first issued in 1987. JB/T 7422.2-1999 Accuracy test of vertical internal honing machines JB/T7422.2-1999 Standard download decompression password: www.bzxz.net

ICS25.080.50
Machinery Industry Standard of the People's Republic of China
JB/T7422.2-1999
Vertical Internal Grinding Machine
Published on 1999-05-20
National Bureau of Machinery Industry
Precision Inspection
Implementation on 2000-01-01
JB/T7422.2—1999
This standard is revised on the basis of ZBJ55017—87 "Vertical Internal Grinding Machine Precision".
This standard is consistent with the technical content of ZBJ55017-87, and has only been re-edited according to relevant regulations. This standard is part of the "Vertical Internal Grinding Machine" series of standards, which includes the following three parts: JB/T7422.1-1999 Vertical Internal Grinding Machine Parameters JB/T7422.2-1999 Vertical Internal Grinding Machine Accuracy Test Vertical Internal Grinding Machine Technical Conditions
JB/T7422-—1994
The standards supporting this standard are:
JB/T5603-1991 Vertical Internal Grinding Machine Series Spectrum
JB/T9896-1999 Grinding Head Parameters bzxZ.net
This standard replaces ZBJ55017-87 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Boring and Drilling Machine Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard is Dahe Machine Tool Factory. This standard was first issued in 1987.
1 Scope
Machinery Industry Standard of the People's Republic of China
Precision Inspection
Vertical Internal Honing Machine
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of vertical internal honing machines. This standard is applicable to general-purpose vertical honing machines with a maximum hole diameter of 25~1000mm. 2 Referenced Standards
JB/T7422.2-1999
Replaces ZB J55017—87
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T17421.1—1998 General Rules for Machine Tool Inspection Part 1: Geometric Accuracy of Machine Tools under No-load or Precision Machining Conditions 3 General Requirements
3.1 Adjust the installation level in accordance with 3.1 of GB/T17421.11998. Place a level gauge in the longitudinal and transverse positions in the center of the workbench. The readings of the level gauge in the longitudinal and transverse directions shall not exceed 0.040/1000. 3.2 During inspection, the actual inspection sequence can generally be arranged according to the requirements of installation and disassembly of inspection tools and inspection convenience. 3.3 During the working accuracy inspection, the inspection of the test piece should be carried out after precision honing. 3.4 When the measured length is different from the length specified in this standard, the tolerance shall be converted according to the measurable length in accordance with the provisions of 2.3.1.1 of GB/T17421.1-1998. When the conversion result is less than 0.005mm, it shall still be calculated as 0.005mm. 3.5 The direction parallel to the bed rail is called the longitudinal direction, and the horizontal direction perpendicular to the longitudinal direction is called the transverse direction. 3.6 The plane symmetrical to the spindle axis and the column rail is called the transverse plane, and the vertical plane perpendicular to the transverse plane through the spindle axis is called the longitudinal plane.
Approved by the State Machinery Industry Bureau on May 20, 1999 and implemented on January 1, 2000
JB/T7422.21999
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